TW200422183A - Substrate for vertical orientation and method for making a film of vertically oriented liquid crystal phase difference - Google Patents

Abstract

This invention provides an orientation substrate for obtaining a film of vertically oriented liquid crystal having a phase difference, with a simple method without a special treatment, and a method for making a film of vertically oriented liquid crystal having a phase difference using such an orientation substrate. A substrate for vertical orientation having an inorganic layer whose surface has an acrylic polymer layer formed thereon is used. A layer of a liquid crystal compound is provided on the substrate by coating to vertically orient the liquid crystal compound.

Description

200422183 (1) Description of the invention: [Technical field to which the invention belongs] The present invention relates to an alignment substrate for vertically aligning a liquid crystal compound, and a method for manufacturing a vertical alignment liquid crystal retardation film using the alignment substrate. [Prior art] It is known that a liquid crystal compound layer is formed on a substrate having a so-called orientation such as polyimide or polyvinyl alcohol that has undergone rubbing treatment. By passing an appropriate temperature and time, This liquid crystalline compound is oriented in the rubbing direction. The alignment direction of the liquid crystalline compound is usually the rubbing direction. However, depending on the type of the alignment substrate or the processing conditions, the alignment direction may be perpendicular to the surface of the alignment substrate. Various methods are known for orienting a liquid crystalline compound in a direction perpendicular to the surface of the alignment substrate, and various methods are described in Patent Documents 1 to 7 and Non-Patent Document 1. [Patent Document 1] Japanese Patent Laid-Open No. 10_3 19408 [Patent Literature 2] Japanese Patent Laid-Open No. 2002_174724 [Patent Literature 3] Japanese Patent Laid-Open No. 2002-365635 [Patent Literature 4] ] Japanese Patent Laid-Open No. 2000-514202 [Patent Literature 5] Japanese Patent Laid-Open No. 2002-69450 5 315491 200422183 [Patent Literature 6] WO97 / 44703 [Patent Literature 7] Japanese Patent Laid-Open No. 9 -52962 [Non-Patent Document 1] Compilation of the Liquid Crystal Introduction Manual Editorial Committee, Liquid Crystal Introduction Manual, Maruzen Co., Ltd., page 3 5 8 The present invention is to provide a novel vertical alignment substrate for orienting liquid crystal compounds in the vertical direction. . In order to solve the above-mentioned object, the present inventors have conducted intensive research and found that by using a vertical alignment substrate formed by forming an acrylic polymer layer on the surface of an inorganic substance layer, a liquid crystal compound layer is formed on the alignment substrate. The liquid crystal compound can be oriented in a direction perpendicular to the surface of the alignment substrate by performing alignment in a liquid crystal state, and the present invention is completed. [Summary of the Invention] In other words, the present invention relates to a type of vertical alignment substrate, which is formed by forming an acrylic polymer layer on the surface of an inorganic substance layer; (2) the vertical as described in (1) Orientation substrate, the helmet ^ film; the shell layer is formed on the polymer (3) as described in (1M (2) vertical Xiao substrate, the polymer is polymerized using at least acrylic acid vinegar =, acrylic The acid w is as large as (3) m. The substrate is used for orientation. The thickness of the acrylic polymer layer is 0.0 1 // m to 2 0 // m; (5) — vertical A method for manufacturing an alignment liquid crystal retardation film is characterized in that a liquid crystal compound layer is formed on the acrylic polymer layer of the substrate for vertical alignment according to any one of (1) to (4), and in a liquid crystal state, Orienting the liquid crystalline compound in the vertical direction of the substrate surface for vertical alignment and immobilizing it while maintaining this alignment state; (6) The method for manufacturing a vertical alignment liquid crystal retardation film as described in (5), wherein , Liquid crystal compounds are fixed liquid crystal acrylate compounds; (7) An optical film comprising: (2) or (3) a substrate for vertical alignment, and a vertically-aligned liquid crystal retardation film oriented in the vertical direction of the alignment film surface; (8) ) —A reflective or reflective transflective liquid crystal display device having the optical film described in (7). [Embodiment] The inorganic substance layer used in the substrate for vertical alignment of the present invention may be, for example: The substrate of the glass plate itself is formed of inorganic compounds:: Those who form an inorganic material layer on the adhesive film by evaporation, sputtering, coating, etc. Inorganic materials are: inorganic metals such as Feng Lu, silver, or oxidation compounds Preferably, it is ...-, or silver. Chain and oxygen: 铲 Shovel thickness: knives' also covers, for example, when aluminum is vapor-deposited on a polymer film, the layers are "oxidized" to produce oxides or the like. Inorganic: The thickness is "only limited to a certain degree of uniformity", but it is preferably 10 nm and there is no particular Wnm to 10 / zm, especially 0.001 "m to m 200422183 is preferred. In addition, The surface of the layer of the inorganic substance is preferably The degree of smoothness that affects the orientation of the liquid crystal compound layer formed last. The substrate used for the vertical alignment substrate of the present invention may be, for example, an inorganic compound or a polymer film such as the above-mentioned glass plate. Polymer The thin film is preferably formed with an inorganic substance layer with a smoothness that does not affect the orientation of the liquid crystalline compound layer formed last, and has superior processability when forming an acrylic polymer layer thereon. Examples of thin materials include films made of polyester, polycarbonate, polyarylate, polyether maple, triethyl cellulose, and cycloolefin polymers. These films may be added to improve the processability described above. Plasticizer for phthalates such as triphenyl phosphate and phthalic acid vinegar, or ethyl phthalate glycolate. In addition, the thickness of the high-molecular film is preferably from 1 G / Zm to ·, and more preferably from 20 to ⑽ # m. The acrylic polymer used in the substrate for vertical alignment of the present invention is a copolymer of (meth) acrylate and other copolymerizable compounds. Examples of the main components of (meth) acrylic acid include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, isopropyl (meth) acrylate, and (meth) acrylic acid. N-butyl acetic acid, isobutyl vinegar (meth) acrylic acid, second butyl vinegar (meth) acrylic acid, n-pentyl vinegar (meth) acrylate, n-hexanoic acid (meth) acrylate, (meth) N-heptyl acrylate, n-octyl (meth) acrylic acid, n-octyl (meth) acrylic acid, n-decanoic acid (meth) acrylic acid, n-dodecyl (f-based) acrylic acid (Meth) propionic acid burning vinegar, etc. Other copolymerizable compounds include, for example, acrylic acid, methacrylic acid, cis dilute acid, itaconic acid and other compounds, 200422183 (methyl ) 2-hydroxyethyl acrylate, octahydroxypropyl acrylate (fluorenyl), 3-hydroxy-2-hydroxypropyl acrylate (fluorenyl), diethylene glycol mono (meth) acrylate, etc. (曱(Meth) acrylic acid esters. By copolymerizing such (meth) acrylic acid esters having a carboxyl group and a hydroxyl group with an alkyl ester of acrylic acid as described above, the obtained The polymer can be cross-linked by adding a cross-linking agent, which can impart appropriate hardness to the acrylic polymer layer and change the solubility of the solvent to improve the solvent resistance. In addition, other copolymerizable compounds can be added as required. , Such as: (isobornyl (metha) acrylate), (dibornyloxymethacrylate), N, N_: f-aminopropylpropylamine, acrylamide Phenyl, isopropylacrylamide, propylammonium, methacrylamine, etc. Second, the usage ratio of these compounds is 50% to 98% by weight of alkyl acrylate (preferably $ 70) % By weight to 98% by weight. / 0, other copolymerizable: daggers are about 2% by weight to 50% by weight (preferably 2% by weight to 30% by weight). According to the needs of other compounds added, Relative to the mixture of acrylic acid and other copolymerizable compounds, it is in the range of 0 to M% by weight (preferably 0 to 10% by weight / 0). In order to copolymerize these compounds, Polymerization was started by adding a polymerization starting sheet J and heating it in a row. Polymerization Examples of the initiator include: azobisisoynitrile, phenylhydrazine peroxide, di-tert-butyl peroxide, dilute peroxide, etc. It can also be compared with the above-mentioned polymerizable compounds during the polymerization. The mixture is added at # chu1 Λ Λ 忒 寺 at a level of 0.01% to i% by weight (preferably 01 to 1 ° /. To 0.5% by weight).

Q 315491 422183, etc. is the hard and acrylic solvent of acrylic polymer after the combination, and can also be cross-linked with a cross-linking agent. Examples of the cross-linking agent include: ::: isocyanic acid, hexamethylene diisocyanate and other aromatic and aliphatic compounds, alcohol compounds, butyl etherified styrene melamine, trimethylol melamine Women's melamine compounds, diamine compounds, epoxy resin compounds, 1-resin resin compounds, etc. At the time of crosslinking, these may be added in an amount of about 1% to 30% by weight (preferably 5% to 20% by weight) with respect to the polymer after polymerization. The acrylic polymer used in the present invention can be dissolved in ethyl acetate or butyl acetate, toluene, for example, a (meth) acrylate and other copolymerizable compounds, and a polymerizable compound added as needed. Dimethyl benzyl, isopropyl alcohol, methyl ethyl ketone, methyl isobutyl ketone and other organic solvents can be obtained by polymerization in the presence of a polymerization initiator under heating. In addition, you can also use: Paraloid (Paraloid, trade name, transliteration) AT_746, Paralloy AT-63, Paralloy WR-97, Paralloy AT-400, Paral La Royd AT-410, Para Royd AT-76, Para Royd AT-81, Para Royd AT-1 47, Para Royd AT-85, Para Royd AT-148, Pararoy AT-9LO, Pararoy AU-608S, Pararoy AU-608B, Pararoy AU-608X, Pararoy AU- • 1 164 Paralloyd AU-1004, Paralloyd AU-1033, Paralloyd AU-946, Paralloyd AU-1166 (the above are all ROHM Anders Haas companies (company name Commercially available acrylic polymers such as Paralloyd AU-608B and Paralloyd AU-1166 are preferred. The substrate for vertical alignment of the present invention is subjected to cross-linking treatment by removing the solvent while heating the solvent by applying 10 315491 200422183 material solution machine 2 material layer i on the polyester film and applying the above-mentioned acrylic acid polymerized with a crosslinking agent. And the obtained, content I: enoic acid polymer layer can be obtained. In the preparation of acrylic polymerization with added cross-linking agents, the solvents used in the text can include, for example, aromatic dimethyl methanol such as toluene, xylene, ethanol, isopropanol, n-butanol, and isobutanol. Class II class, fluorenyl isobutyl ketone, 4-pentanone, cyclopentanone, hexanone, etc. ® isocyanates: methyl acid ester, ethyl acetate, butyl acetate, lactate hydrazine, ethyl lactate It is called propylene glycol monoacetate, acetic acid vinegar, methyl cellosolve, ethyl cellosolve and other cellosolvents, such as Jiyuan, Cyclone, Methylcyclohexyl, and so on. These solvents may be used singly or in a mixed solvent in which a plurality of solvents are mixed for the purpose of formulation. The coating method is only required to achieve a smooth surface to the extent that it does not affect the orientation of the liquid crystalline compound layer. There are no restrictions, but it is preferably such as: spin coating method, wire rod coating method, gravure coating Coating methods, such as coating methods, micro gravure coating methods, calendar coating methods, spray coating methods, meniscus coating methods, dip coating methods, and extrusion die coating methods. In addition, the thickness of the acrylic polymer layer is preferably in the range of 0.001 "to 20 ... and more preferably in the range of 〇 ... 〇." M. "Using the substrate for vertical positioning and orientation of the present invention obtained in this way, A liquid crystal compound layer is formed on the alignment substrate, and the liquid crystal compound is placed in an appropriate condition for displaying the liquid crystal state, so that the liquid crystal compound can be aligned in a direction perpendicular to the surface of the substrate. &Amp; In a certain temperature range, it is a low molecular weight or high molecular weight liquid that shows nematic phase. It is a day-to-day compound, and it is best to fix the orientation of the compound after orientation. ^ ^ ^ J compound The state of vertical alignment 200422183 can be fixed, and it can be directly used as a vertical alignment liquid crystal retardation film. Therefore, in the case of a low molecular weight liquid crystal compound, a polymerizable compound is preferred. Such a compound is as follows: (meth) acrylic Polymerizable substituents such as fluorenyl or epoxy, which exhibit liquid crystallinity in a certain temperature range and can be polymerized in the presence of a polymerization initiator. Specifically, for example: The following liquid crystal acrylates and the like disclosed in Patent Document 4, Patent Document 5, and Patent Document 6 are disclosed.

H2 C—

〇-(⑶ 2 丨 ”0 | hc sound

12 315491 \ hc-ch2

H2C «CH >, h2i6d · ^, general,: · ^ 〇Η, 6ιμ (HOCH2 or, for example: Shi Shiling 4, 丨 七 ★ Milk-based liquid crystalline compounds and the mixture, or as shown in Patent Document 7 Thousands of mi, liquid crystal acrylics such as discotic liquid crystals, etc., are preferably liquid acrylics which can polymerize 66 σ in the presence of a photopolymerization initiator using ultraviolet rays. This One kind of liquid crystalline acrylic vinegar vinegar can be used alone, but in order to expand the temperature range for displaying liquid crystallinity or to control the birefringence, it is usually best to use a mixture of two or more kinds. Orienting the above liquid crystalline compound for vertical alignment The method of applying a vertical direction of the substrate surface to the liquid crystal compound solution containing a polymerization initiator, for example, is applied to the propionic acid polymer surface of the substrate for orientation of the present invention. This coating method preferably applies the compound. A method in which the following solvents are used to dissolve and form a solution, and the coating is performed using a coating device. The solvent used when dissolving the liquid crystalline compound depends on the solvent solubility of the compound used, or The wettability of the acrylic polymer layer on the coated polymer substrate for vertical alignment varies depending on factors such as toluene, dibenzobenzene, etc., such as methanol, ethanol, isopropyl alcohol, Alcohols such as butanol, isobutanol, acetone, ethyl ethyl ketone, ethyl isobutyl ketone, 'pentanone, cyclopentanone, cyclohexanone equivalent ketones' methyl acetate, ethyl acetate, butyl acetate, lactic acid Phenyl esters, ethyl lactate monoesters, malonate monomethyl acetate, methyl cellosolve, ethyl 315491 13 200422183, cellosolve, butyl cellosolve, cellosolve, hexane, hexane, heptane Hydrocarbons such as alkanes, etc. The a-coated yuan and the methyl group may be mixed with a plurality of solvents depending on the purpose of mixing, or a mixed solvent mixed with the meditation of the Rada Sheep. The ancient examples are: spin coating method, wire rod coating method , Gravure coating method; micro-gravure coating method, extension coating method, method, dip coating method, extrusion die m, type, and moon-shaped coating hanging type coating method, and other coating compound layer thickness depends on / 夂 曰… The phase difference value, the liquid crystal compound, and the refractive index are appropriate. Decided, it is best to take ten to ten Feng (M # m to 7 // m, especially to the extent of 5 // m. After eight times' removing the solvent by heating *, the solvent is removed according to the type of compound, and (or ), The liquid crystal compound exhibits a liquid crystal state, and is suitable for orientation under a temperature condition of '# by putting m, and the liquid crystal compound is oriented in the vertical direction of the substrate surface for vertical alignment. Next, if the polymerization initiator is In the case of a photopolymerization initiator, ultraviolet rays are irradiated at a temperature at which the liquid crystal compound can maintain the alignment state, and the liquid crystal compound is polymerized to fix the alignment state. The amount of ultraviolet rays is usually 100 to 1000 mJ / cm2 To the extent that it is difficult to proceed in the air or the polymerization reaction, irradiation is performed under a nitrogen environment. A thin film having a liquid crystal compound layer whose orientation state is fixed in this way can be used as a vertically aligned liquid crystal retardation film. For example, when the acrylic polymer layer and liquid crystal. Compound layer of the substrate for vertical alignment of the present invention can be peeled off, an adhesive or the like can be used to transfer only the liquid crystal compound layer to another groove film (such as a retardation film or polarization). Film) on. Such a vertically-aligned liquid crystal retardation film can be improved by, for example, using an adhesive on the liquid crystal compound layer and transferring it to a retardation film with a viewing angle dependence and a uniaxial extension. Viewing angle dependence of uniaxially extending retardation film. In addition, since the substrate for vertical alignment after the transfer can be reused, it is not necessary to prepare the substrate for vertical alignment every time, which can greatly reduce the cost. In addition, the inorganic compound layer is made of aluminum, alumina, or silver, and the substrate for vertical alignment of the present invention having an acrylic polymer layer thereon, and the vertically aligned liquid crystal retardation film formed on the alignment substrate according to the method of the present invention, The optical film of the present invention containing the alignment substrate and the vertical alignment liquid crystal retardation film, which is used by directly forming an integrated object, or integrated with the alignment substrate and the vertical alignment liquid crystal retardation film through an adhesive or a bonding agent, can be Used as a reflective transmissive film for reflective or transflective liquid crystal display devices. Reflective or reflective transflective liquid crystal display devices usually use circularly polarizing films, and circularly polarizing films are usually retardation films with a polarizing film and a so-called "1/4 wave plate" with a phase difference of 1/4. , Laminated in such a manner that the absorption axis of the polarizing film and the retardation phase axis of the retardation film are 45 °. This quarter-wave plate is not limited to a single retardation film. In order to improve the wavelength dependence of the retardation film, it can also cover a retardation film having a plurality of different retardation values. After the phase axis is laminated, the laminated body as a whole also has a quarter-wave plate with an angle of 1 / 4-wave plate function. Because this circularly polarizing film can absorb the reflected light from the reflecting plate, a TN (twisted nematic) type or untwisted parallel or vertical alignment type liquid crystal cell is disposed between the reflecting plate and the circularly polarizing film, and the liquid crystal is used. The battery controls the incident circular polarization for image display. However, when a circularly polarizing film or a liquid crystal cell has field-of-view dependence, the phase difference value varies with viewing angles of 15 315491 200422183, so sharp images can be viewed only in the frontal direction. In this case, by using the reflective or reflective transflective liquid crystal display device of the present invention using the optical film of the present invention, it is possible to simultaneously provide the function of a reflective film and the viewing angle compensation function of a vertically-aligned liquid crystal retardation film. A liquid crystal display device having excellent viewing angle characteristics is obtained. Examples Hereinafter, the present invention will be described in more detail with reference to examples and comparative examples. Example 1 A 10% by weight solution was prepared by diluting Pararoyd AU-608B (manufactured by Roma Anders Haas) with butyl acetate. Next, to this solution was added toluene diisocyanate at a weight of 10/0 relative to the solid content of Pararoide. The solution was uniformly coated on the aluminum vapor-deposited side of the polyester film on which aluminum was vapor-deposited with a wire rod having a thickness of 2 V m after drying, and then the solvent was removed and cross-linked by heating to obtain the present invention. Substrate for vertical orientation ° Second, a mixture of a UV-curable liquid crystal compound

〇〇P ^ 3 QQ H2C-CH-C〇- (CH2) 3-〇-^^ C-0- ^ y-0-C-^^. 〇- (CH2) 3--0-C--HC == CH2 3 6 · 6 parts by weight, 0 0 _ h2c: ch-δ.ο-(ch2) 6 · 〇δ · 〇c3h7 42 "parts by weight,

H2C = CH-CO- (CH2) 6- ° -〇-e ^ ° -〇 ^ cN 9 · 3 parts by weight, 16 315491 200422183 and photopolymerization initiator Yier Jiaqiu 907 (Ciba Super Chemical Company (Manufactured) 丨 2 li h 'orderly dissolved in a mixed solvent of 210 parts by weight of toluene and 90 parts by weight of cyclohexane' to prepare a liquid crystal compound mixture solution having a solid content concentration of 25%. This solution was uniformly coated on the acrylic polymer surface side of the above-mentioned vertical alignment substrate by a spin coater in a thickness of about ˜ # m after drying, and the solvent was removed by heating, and then a high-pressure mercury lamp (120 w / cm) was irradiated. ) And polymerize to produce a vertically aligned liquid crystal retardation film. Next, using a glass plate coated with an adhesive, the obtained vertical alignment liquid crystal retardation film (polymerized liquid crystal compound layer) was peeled from the acrylic polymer layer of the vertical alignment substrate and transferred to the glass plate. As a result, This liquid crystal retardation film is transparent. Then, with respect to the liquid crystal retardation film transferred on this glass plate, an automatic birefringence measuring device (KOBRA-21ADH, manufactured by Oji Instruments Co., Ltd.) was used to measure the wavelength when the liquid crystal retardation film was inclined at the front of the liquid crystal retardation film at a wavelength of 59 The phase difference value in 〇ηιη changes. The results are shown in Figure i. As can be seen from the figure, the obtained liquid crystal retardation film is oriented in the vertical direction of the surface of the substrate for vertical alignment. Example 2 A liquid crystal retardation film was produced in the same manner as in Example 1 except that a glass plate was used instead of the polyg film that had been vapor-deposited. The results are shown in Figure 1. It is understood from Fig. 1 that the obtained liquid crystal retardation film is oriented in the vertical direction of the substrate surface for vertical alignment. 315491 200422183 Figure 1 Phase difference of vertical alignment liquid crystal retardation film with tilt angle 60 ---- r_ ο ο ο 4 3 2

1 2 341 Examples Example I Shi Shi Shi Shi f: t; t:

Inclination angle Γ > Example 3 Instead of using Pararoyd AU-11 66 (manufactured by ROHM Anders Haas) to replace Pararoyd AU-608B (manufactured by ROM Anders Haus) Except for the rest, the same operations as in Example 1 were performed to produce a liquid crystal retardation film. The results are shown in Figure 1. It is understood from Fig. 1 that the obtained liquid crystal retardation film is oriented in the vertical direction of the substrate surface for vertical alignment. Example 4 The substrate for vertical alignment of the liquid crystal compound layer used in Example 1 after the peeling was used, and it was performed again as in Example! In the same manner, a liquid crystal retardation film was produced. The results are shown in Figure i. It can be seen from FIG. I that the obtained liquid crystal retardation film is oriented in the vertical direction of the substrate surface for vertical alignment. 0 315491 200422183 Comparative Example Comparative Example 1 Except for the use of a non-evaporated polycarbonate film instead of the evaporated film Except for the polyacetic acid film of Mine Ming, "although the rest are the same as those in the Examples", the liquid crystal compound is not oriented at all. From the results of Examples 1 to 3 and Comparative Examples, it is known that in the method of the present invention, the liquid crystal compound is oriented in the vertical direction of the substrate surface for vertical alignment. In addition, it was found from Example 4 that the substrate for vertical alignment of the present invention can be reused. (Industrial Applicability) The present invention relates to the production of a substrate for vertical alignment comprising a polyacrylic polymer layer on the surface of an inorganic substance layer, and a vertical liquid crystal retardation film using the substrate for vertical alignment. Method, and optical film containing the vertical alignment substrate and the vertical alignment liquid crystal retardation film, and a reflective or reflective transflective liquid crystal display device having the optical film, by using the vertical alignment substrate of the present invention, The liquid crystal compound can be aligned in the vertical direction of the alignment substrate. In addition, this substrate for vertical alignment is not reusable because it cannot easily be oxidized due to environmental changes such as temperature and humidity, and changes in surface state, as in the case of a single inorganic material layer. Therefore, when the liquid crystal retardation film is to be used only in a vertical alignment, the liquid crystal retardation film can be peeled off from the alignment substrate and used again. “Since it is not necessary to produce an alignment substrate each time, the cost can be greatly reduced” and The obtained liquid crystal retardation film can be made thin. In addition, by using the vertically-aligned liquid crystal retardation film obtained by the present invention, the viewing angle dependence of a retardation film or a liquid crystal cell stretched by a uniaxial extension of 19 315491 200422183 can be improved. By using the optical film of the present invention, a reflective or reflective transflective liquid crystal display device having excellent viewing angle characteristics can be obtained. [Brief description of the figure] Fig. 1 is a graph showing the change in phase difference caused by the tilt angle of the vertically-aligned liquid crystal retardation film. 20 315491

Claims (1)

200422183 s The scope of patent application: L A substrate for vertical alignment is formed by forming an acrylic polymer layer on the surface of an inorganic substance layer. 2. If the substrate for vertical alignment according to item i of the patent application scope, wherein the inorganic base 4 is made of non-oxide, oxide, or silver, and the inorganic substance layer is formed on the polymer film. 3. The substrate for vertical alignment as described in item 1 or 2 of the F / S patent, wherein the acrylic polymer is a polymer obtained by polymerizing at least dilute acid vinegar. 4. The substrate for vertical alignment according to any one of claims 1 to 3 in the scope of the patent application, wherein the thickness of the acrylic polymer layer is 0.01 μm to 20 μm. 5. A method for manufacturing a vertically-aligned liquid crystal retardation film, comprising forming a liquid crystal compound on the acrylic polycondensation polymer layer of the substrate for vertical alignment according to any one of items 1 to 4 in the patent library. Layer, and "orient the liquid crystal compound in the vertical direction of the substrate surface for vertical alignment" in the liquid crystal state, and perform immobilization while maintaining the alignment state. 6. The method for producing a vertically-oriented liquid crystal retardation film according to item 5 of the patent application, wherein the liquid crystal compound is an immobilized liquid crystal acrylate compound; and the immobilization is performed by irradiating ultraviolet rays. 7. An optical film comprising: a substrate for vertical alignment in the second or third item of the patent application scope, and a vertically aligned liquid crystal retardation film oriented in the vertical direction of the alignment film surface. 8 · —A reflective or reflective transflective liquid crystal display device, which is an optical film with the seventh item in the patent scope of application 21 315491 200422183. 22 315491